Geaphenbau



(No Model.)

0. GOERPER.

DYNAMOELEGTRIG MAOHLNE.

No. 353.414. Patented Nov. 30, 1886.

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. 0 4 Wm, C By W ATTORNEYS N. PETERS. Phnlo-Lilhoghpher, Washinglon.11cv UNITED STATES PATENT OFFICE,

CARL OOERPER, OF COLOGNE-ON-THE-RHINE, PRUSSIA, ASSIGNOR TO THE HELIOSAGTIENGESELLSOHAFT FOR ELEKTRISOHES LIGHT UND TELE- G-RAPHENBAU, OFEHRENFELD AND COLOGNE, GERMANY.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 353,414, dated November30, 1886,

Application filed May 6 1886. Serial No. 201,294. (No model.) Patentedin Belgium Apr-i119, 1886, No. 72,801.

.T all whom it may concern.-

Be it known that I, CARL COERPER, a subject of the King of Prussia,German Empire, residing at the city of Oologne-onthe Rhine,

in the Kingdom of Prussia, German Empire, have invented certain new anduseful Improvements in Dynamo-Electric Machines, of which the followingis a specification.

This invention relates to an improved dyio name-electric machine inwhich an effective magnetic field is obtained by a novel arrangement ofthe field-magnets at both sides of the armature; and the inventionconsists of a dynamo-electric machine in which the magnetic field isformed by a number of electromagnets, which are arranged at both sidesof and parallel to the plane of rotation of the armature, and connectedby transverse pole-pieces, which are again connected by short interme-2o diate electro-magnets, also parallel to the plane of rotation of thearmature, as will appear more fully hereinafter, and finally be pointedout in the claims.

In the accompanying drawings, Figure 1 represents a side elevation,partly in section, and

Fig. 2 a vertical transverse section, of my improved dynamo-electricmachine.

Similar letters of reference indicate corresponding parts.

In the drawings, A A represent the fieldmagnets, which are supported onstationary ring-shaped frames D D, through the center of which passesthe driving-shaft E, on which is arranged a commutator, G, and adrivingpulley, G. The ringshaped armature F is supported by adisk-shaped frame intermediately between the field-magnets A A, whichextend radially or otherwisefrom the drivingshaft E, at both sides ofand parallel to the plane of rotation of the armature F.

The faces of the pole-pieces O of the electromagnet correspond to theshape of the armature F, and are connected by transversebolts,

so that they almost entirely surround the armature and form an effectivemagnetic field for 4 5 the same.

To increase the force and inductive action of the pole-pieces, or, inother words, to increase the force of the magnetic field, thepole-pieces O O are connectedby short intermediate elcc- 5:) tro-magnetsB, which are arranged sidewise of and parallel to the plane of rotationof the armature F, as shown in Fig. l. The electromagnets 13 re-enforcethe action of the fieldmagnets and produce a very effective mag- 5 5netic field and dynamo electric machine of very simple and comparativelycheap construction.

Having thus described my invention, Iclaim as new and desire to secureby Letters Patent 1. In a dynamo-electric machine, the combination ofradial field-magnets arranged at both sides of and parallel to the planeof rotation of the armature, transverse-pole-pieces at the outer ends ofthe field-magnets, bolts for connecting said pole-pieces, and anarmature rotating between the pole-pieces, substantially as set forth.

2. In a dynamo-electric machine, the con1- bination of field magnetsarranged at both sides of and parallel to the plane of rotation of thearmature, transverse pole-pieces connecting the field-magnets, anarmature rotating be tween the pole-pieces, and intermediateelectro-magnets connecting the pole-pieces at the 7 5 CARL OOERPER.

lVitnesses:

A. MiiHLE, B. R01.

